Kos to Istanbul: time difference
Istanbul is 1 h ahead of Kos. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Kos 05:04 5:04 AM Istanbul 06:04 6:04 AM You –:–
05:04 5:04 AM
Eastern European Standard Time · UTC+2
☀️ 06:41 · 🌙 17:11
06:04 6:04 AM
Türkiye Standard Time · UTC+3
☀️ 07:41 · 🌙 17:56
·
+1 h
Istanbul is 1 h ahead of Kos.
When you, Kos and Istanbul are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇷 Kos
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇹🇷 Istanbul
1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇷 Kos | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 05:04 | 06:04 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Eastern European Standard Time | Türkiye Standard Time |
| UTC offset | UTC+2 | UTC+3 |
| Offset from Kos | — | +1 h |
| IANA zone | Europe/Athens | Europe/Istanbul |
| Daylight saving | On standard time → UTC+3, Mar 28, 04:00 | Not observed |
| Sunrise | 06:41 | 07:41 |
| Sunset | 17:11 | 17:56 |
| Daylight | 10 h 30 min | 10 h 15 min |
| People on this clock | 30,947 | 15,701,602 |
Compare Kos with another city
More comparisons with Kos: the time zones next to it and the far side of the clock.
Big time differences
Kos and Istanbul: common questions
How many hours ahead of Kos is Istanbul?
The clocks in Istanbul are 1 hour ahead of those in Kos (UTC+3 and UTC+2).
What time is it in Istanbul at the start of the working day in Kos?
The working day in Kos starts at 9:00 AM; in Istanbul it is 10:00 AM at that moment.
What time is it in Istanbul at the end of the working day in Kos?
The working day in Kos ends at 6:00 PM; in Istanbul it is 7:00 PM at that moment.
When do working hours in Kos and in Istanbul overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 5:00 PM in Kos, which is 10:00 AM to 6:00 PM in Istanbul.
When does the date change in Istanbul compared with Kos?
The new day starts in Istanbul earlier: at 11:00 PM in Kos it is already midnight there. Until 1:00 AM in Istanbul, Kos is still on the previous day.
Does the time difference between Kos and Istanbul change?
Yes. The clocks change only in Kos. From March 28, 2027, Istanbul and Kos will have the same time.
